validate-project-version.yml

name: "Check project version"
on:
  pull_request:
    branches:
      - main

jobs:
  version-check:
    name: "Check project version doesn't already exists."
    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - id: parse
        name: "Extract version number from .version-data.json file."
        run: |
          # Parse .version-data.json file and extract the version
          DSFR_VERSION=$(cat ./.version-data.json | jq .version)
          
          # Send the version to the output
          echo "dsfr-project-version=$DSFR_VERSION" >> $GITHUB_OUTPUT

      - id: version-check
        name: "Check if a tag matching the version doesn't already exists."
        run: |
          # Get the version from the previous step
          VERSION=${{ steps.parse.outputs.dsfr-project-version }}

          if git rev-parse "$VERSION" >/dev/null 2>&1; then
            echo "A tag aleady exists for this version, please update the .version-data.json file to a new version.";
            exit 1;
          fi